I've only used one dose - about 5 ml. Shutting down my tank, so don't need this after all. I have used this product previously with great success. This is a brand new bottle. $39.99 on marine depot or BRS, so good deal.

Fully programmable 24/7 with .5 hour or 1 hour settings, plus cloud, moon, etc. Remote control included. This is a discontinued model but here are the specs: https://www.importitall.co.za/32-Programmable-LED-Aquarium-Light-Fixture--EUPHOTICA-32-Full-Color-Spectrum-Saltwater-Coral-Fish-Tank-Grow-Li-ap-B00KC9GY1S.html
Been running this for about 2 years on a densely packed SPS tank, and I'd guess I have about 7,000 hours so far. Still a lot left in this unit.
Plus, you can have the wall mount (from a TV mount that I converted into a mount). Very versatile.

Just set this up in September, and it's in great condition - no scratches as far as I can see. Back and bottom are painted black with latex - so you can keep it black or easily scrape it off if you want a different application.